Synthesis, experimental and theoretical characterization of palladium(II) and platinum(II) saccharinate complexes with 2-(2-pyridyl)benzimidazole

Spectrochim Acta A Mol Biomol Spectrosc. 2011 Sep;79(5):1171-8. doi: 10.1016/j.saa.2011.04.038. Epub 2011 May 10.


New palladium(II) and platinum(II) complexes of saccharinate (sac) with 2-(2-pyridyl)benzimidazole (pybim) have been synthesized and characterized by elemental analysis and spectroscopic techniques. From the experimental studies, these complexes were formulated as [Pd(pybim)(sac)2] (1), and [Pt(pybim)(sac)2]·4H2O (2). The ground-state geometries of both complexes were optimized using density functional theory (DFT) methods at the B3LYP level. A bidentate pybim ligand together with two N-coordinated sac ligands form the square-planar MN4 coordination geometry around the palladium(II) and platinum(II) ions. The calculated IR and UV-vis spectral data have been correlated to the experimental results. Thermal analysis data support the molecular structures of both complexes.

MeSH terms

  • Benzimidazoles / chemistry*
  • Benzimidazoles / metabolism*
  • Crystallography, X-Ray
  • Magnetic Resonance Spectroscopy
  • Models, Molecular
  • Models, Theoretical*
  • Molecular Structure
  • Organometallic Compounds / chemical synthesis*
  • Organometallic Compounds / metabolism*
  • Palladium / chemistry*
  • Platinum / chemistry*
  • Spectrophotometry, Infrared


  • 2-(2'-pyridyl)benzimidazole
  • Benzimidazoles
  • Organometallic Compounds
  • Platinum
  • Palladium